Surprisingly, I found USB adaptor with $10 cable sound overall better than onboard USB with audiophile cable (Though I paid $30+25 for adaptor with shipping). This leaves me curiosity how people will love their onboard ports with such devices like DAC202 or Ayre/DCS/Esoteric USB DAC.

As long as the software preserves the bits from the .wav file or lossless compressed file to the USB port it doesn't matter what kind of hardware you are using when connecting to a USB DAC. An asych based USB DAC would be the best one to use wrt jitter and clocking issues. Any USB cable that meets spec should be ok.